Toothbrush drive train



FIG. 1 is a front isometric view of a toothbrush drive train.

FIG. 2 is a rear isometric view thereof.

FIG. 3 is a front elevation view thereof.

FIG. 4 is a rear elevation view thereof.

FIG. 5 is a left side elevation view thereof.

FIG. 6 is a right side elevation view thereof.

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof.

The broken lines illustrate portions of the toothbrush drive train that form no part of the claimed design. 

CLAIM I claim the ornamental design for a toothbrush drive train, as shown and described. 